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sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
185 lines
No EOL
6.7 KiB
C
Vendored
185 lines
No EOL
6.7 KiB
C
Vendored
/* $NetBSD: pte.h,v 1.36 2022/08/21 09:12:43 riastradh Exp $ */
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/*
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* Copyright (c) 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Frank van der Linden for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1997 Charles D. Cranor and Washington University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _I386_PTE_H_
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#define _I386_PTE_H_
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#ifdef _KERNEL_OPT
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#include "opt_xen.h"
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#endif
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/*
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* The PAE extension extends the size of the PTE to 64 bits (52bits physical
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* address) and is compatible with the amd64 PTE format. The first level
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* maps 2M, the second 1G, so a third level page table is introduced to
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* map the 4GB virtual address space. This PD has only 4 entries.
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* We can't use recursive mapping at level 3 to map the PD pages, as this
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* would eat one GB of address space. In addition, Xen imposes restrictions
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* on the entries we put in the L3 page (for example, the page pointed to by
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* the last slot can't be shared among different L3 pages), which makes
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* handling this L3 page in the same way we do for L2 on i386 (or L4 on amd64)
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* difficult. For most things we'll just pretend to have only 2 levels,
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* with the 2 high bits of the L2 index being in fact the index in the
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* L3.
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*/
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#if !defined(_LOCORE)
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/*
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* here we define the data types for PDEs and PTEs
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*/
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#include <sys/stdint.h>
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#ifdef PAE
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typedef uint64_t pd_entry_t; /* PDE */
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typedef uint64_t pt_entry_t; /* PTE */
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#else
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typedef uint32_t pd_entry_t; /* PDE */
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typedef uint32_t pt_entry_t; /* PTE */
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#endif
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#endif
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/*
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* Mask to get rid of the sign-extended part of addresses.
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*/
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#define VA_SIGN_MASK 0
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#define VA_SIGN_NEG(va) ((va) | VA_SIGN_MASK)
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/*
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* XXXfvdl this one's not right.
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*/
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#define VA_SIGN_POS(va) ((va) & ~VA_SIGN_MASK)
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#ifdef PAE
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#define L1_SHIFT 12
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#define L2_SHIFT 21
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#define L3_SHIFT 30
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#define NBPD_L1 (1ULL << L1_SHIFT) /* # bytes mapped by L1 ent (4K) */
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#define NBPD_L2 (1ULL << L2_SHIFT) /* # bytes mapped by L2 ent (2MB) */
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#define NBPD_L3 (1ULL << L3_SHIFT) /* # bytes mapped by L3 ent (1GB) */
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#define L3_MASK 0xc0000000
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#define L2_REALMASK 0x3fe00000
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#define L2_MASK (L2_REALMASK | L3_MASK)
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#define L1_MASK 0x001ff000
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#define L3_FRAME (L3_MASK)
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#define L2_FRAME (L3_FRAME | L2_MASK)
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#define L1_FRAME (L2_FRAME|L1_MASK)
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#define PTE_4KFRAME 0x000ffffffffff000ULL
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#define PTE_2MFRAME 0x000fffffffe00000ULL
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#define PTE_FRAME PTE_4KFRAME
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#define PTE_LGFRAME PTE_2MFRAME
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/* macros to get real L2 and L3 index, from our "extended" L2 index */
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#define l2tol3(idx) ((idx) >> (L3_SHIFT - L2_SHIFT))
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#define l2tol2(idx) ((idx) & (L2_REALMASK >> L2_SHIFT))
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#else /* PAE */
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#define L1_SHIFT 12
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#define L2_SHIFT 22
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#define NBPD_L1 (1UL << L1_SHIFT) /* # bytes mapped by L1 ent (4K) */
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#define NBPD_L2 (1UL << L2_SHIFT) /* # bytes mapped by L2 ent (4MB) */
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#define L2_MASK 0xffc00000
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#define L1_MASK 0x003ff000
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#define L2_FRAME (L2_MASK)
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#define L1_FRAME (L2_FRAME|L1_MASK)
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#define PTE_4KFRAME 0xfffff000
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#define PTE_4MFRAME 0xffc00000
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#define PTE_FRAME PTE_4KFRAME
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#define PTE_LGFRAME PTE_4MFRAME
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#endif /* PAE */
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/*
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* x86 PTE/PDE bits.
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*/
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#define PTE_P 0x00000001 /* Present */
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#define PTE_W 0x00000002 /* Write */
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#define PTE_U 0x00000004 /* User */
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#define PTE_PWT 0x00000008 /* Write-Through */
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#define PTE_PCD 0x00000010 /* Cache-Disable */
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#define PTE_A 0x00000020 /* Accessed */
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#define PTE_D 0x00000040 /* Dirty */
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#define PTE_PAT 0x00000080 /* PAT on 4KB Pages */
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#define PTE_PS 0x00000080 /* Large Page Size */
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#define PTE_G 0x00000100 /* Global Translation */
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#define PTE_AVL1 0x00000200 /* Ignored by Hardware */
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#define PTE_AVL2 0x00000400 /* Ignored by Hardware */
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#define PTE_AVL3 0x00000800 /* Ignored by Hardware */
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#define PTE_LGPAT 0x00001000 /* PAT on Large Pages */
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#ifdef PAE
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#define PTE_NX 0x8000000000000000ULL /* No Execute */
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#else
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#define PTE_NX 0 /* Dummy */
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#endif
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#define _MACHINE_PTE_H_X86
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#include <x86/pte.h>
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#undef _MACHINE_PTE_H_X86
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#endif /* _I386_PTE_H_ */ |